The charge-to-mass ratio of an electron was established by
A) Millikan's oil drop experiment.
B) Rutherford's gold foil experiment.
C) Thomson's cathode ray tube experiment.
D) None of these
Correct Answer:
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Q19: Which group 5A element is most metallic?
A)N
B)P
C)Sb
D)Bi
Q20: The horizontal rows of the periodic table
Q21: Which of the following represent isotopes? A:
Q22: Which of the following two atoms are
Q23: The mass number of an atom is
Q25: Boron-9 can be represented as
A) 
Q26: Which subatomic particle has the smallest mass?
A)a
Q27: How many electrons are in a neutral
Q28: Which of the following is a part
Q29: What is the chemical symbol for an
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